Problem: What is the amount, in moles, of each of the following substances?3.65 g Zn

We’re being asked to determine the amount, in moles of 3.65 g Zn.

Recall that the molar mass of an element is equal to the mass of 1 mole of that element. 

This means that we need to do a mass to mole calculation. The flow of the solution will be like this:

mass Zn (molar mass Zn) → mole Zn

First, we need to determine the molar mass or molecular weight of Zinc, Zn based on the Periodic Table: